Feature or enhancement

Proposal:

Currently, the mechanism behind virtual environments is implemented in thesite module. This means that disabling thesite initialization (passing-S) disables virtual environments.

I would like to move the virtual environment detection fromsite to the interpreter initialization (getpath), which would essentially consist of settingsys.prefix tosys.exec_prefix to the virtual environment prefix ingetpath.

The motivation is the same asGH-126793, the same UX example applies. Runningpython -S -m ensurepip inside a virtual environment would install to the system, instead of the virtual environment.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• GH-126985: move pyvenv.cfg detection from site to getpath #126987
• GH-126985: Don't override venv detection with PYTHONHOME #127968